Penetrable (adjective)

Capable of being penetrated; permeable.

Origin:

From the latin word "penetrare" meaning "to penetrate" or "to pass through".

Examples:

1. The material is penetrable and air can pass through it.
2. The surface was so smooth that it was almost penetrable to the touch.
3. The penetrable membrane allows water to pass through, while keeping larger particles out.
4. The penetrable barrier allows light to pass through.
5. The penetrable shield was designed to protect the spacecraft from solar radiation.